If a new viewer tuned in to DS9 S6 they'd be utterly lost.
Not just that. If you tune in an episode of TNG and didn't like it, well okay, because at the end of that particular episode it was over.
If you watch a episode of DS9 and didn't like it, you're screwed, because the theme of that episode is going to continue for the next few seasons.
The Enterprise Dee is in a battle, and you don't really care for warfare/combat episodes, the next episode of TNG will be something different.
If you didn't like the Dominion War, isn't that just too bad? 'Cause that all you be getting for a while.